Hydraulic system for driving the rotation of sundry members in machines for the working of skins and hides



y 9, 1953 E. GIANOGLIO 2,638,759

HYDRAULIC SYSTEM FOR DRIVING THE ROTATION OF SUNDRY MEMBERS IN MACHINES FOR THE WORKING OF SKINS AND HIDES Filed July 7, 1950 i l l INVENTOR. Ermonno Gionoglio giolgw mm ATTORNEYS Patented May 19, 1953 UNITED? STATES r HYDRAULIG SYSTEM ronmtlvrno rns no},

TAT-ION -F-r-SUNDRY MEM;BERS1 IN. MA- cnmrsroa. THE WORKING or SKINSI AND HIDE'S It is the object of the present invention to provide a hydraulic system for driving the rotation of sundry members in 'mac'hines forthe working of skins and hides; comprising each at least one operating roller rotating at a higlrnum her of turns and at least one auxiliary roller rotatingat a number of turns in general lower than the operating roller, in which there are provided a pump putting a fluid under pressure, and at least one hydraulic motonactuated by said fluid, the motor being designed to drive the rotation-of said members of the machine;-

The machines, to which the present invention can be applied are thoseofthe'dfollowing kinds: fie'shing machines, setting-out machines; unhairingand scouring machines, samming machines, shaving machines, bufiingmachines etc: that-is tosay, in general all the machines for the tanning industries in which there is provided an operating roller made torotateata high number of turns, and one or more auxiliary rollers (for instance roller for conveying the skin or hide. weighting rollers for the transport rollers, etc.) characterized in that they are endowed with a more reduced normal rotation.

All these machines may be diagrammatically represented as by the figures of the accompanying drawing; in particular, the operating roller A may be provided with blades Z sharpened at their outer edge by means of a sharpening apparatus B provided for this purpose (case of the flashing and shaving machines etc.) or it may be provided with iblades having a bevelled border and different technological functions (setting-out machines, unhairing and scouring machines). The figure of the accompanying drawing relates to the case of a flashing machine; without the sharpening device it may be plainly referred to setting-out, to unhairing and scouring machines etc.

It is the object of the present invention to provide a hydraulic device for the rotation of various members in machines for Working skins and hides, characterized in that there are provided a pump putting a fluid under pressure and a hydraulic motor, which is actuated by said fluid, said motor being designed to cause members of the machine to rotate. In some cases, where constructional reasons let it appear advisable, a number of hydraulic motors may be adopted in the same machine, each of them being entrusted with the task of driving determined members.

In the accompanying drawing, Fig. 1 represents an elevational view partly in section of the ma- 3 Claims; (Clr 69-342) 2 chine in the openfi position, and Fig. 2 repre sents an elevationalview partly in section of the machine in the closed position or working positionythe working position being the position in which the rollers serving to transportlithe skin or hide are approached to thdoperating' .rol'ler which effeots as said" above the fieshingyi the setting-out, the unhairing andscouringthe'sams ming; -the-buffing, the *shavingwetc. of. theskin crime; i r

The operating roller ismadeto rotatebymeans of a motor provided special-ly for this purpose, directly or by wayof transmis'sion etc. Forithe sake of simplicity, said motor has..not beenrep resented in the figure. Y

The closing-of -the machine is effectedby means of thecylindersc and plunger S." The. fluid put under pressure by the pumpP (actuated at the expenses of the energy supplied to themac'hine from outside), actsiupon the plunger S causing it to run a complete stroke within the cylinder C.

, The rod a acts upon the lever L fulcrated at F and moves the transporting rollers T to the operating roller A.

There is provided a valve D1, which can assume the two positions represented respectively by the two figures of the accompanying drawing, to open or to close the machine as the case may be, putting the pump in communication respec tively with one or the other chamber of the cylinder C by way of the pipe q or 0 (Figures 1 and In the closing stage, the plunger S arrived at the end of its stroke uncovers an opening which permits the fluid under pressure to pass along the pipe 10 to the hydraulic motor M1, which causes the transporting roller to rotate.

In the opening stage, the fluid under pressure acts, through the valve D1 and the pipe q, upon the other face of the plunger S and determines its displacement in a direction opposite to the one described before.

The figure shows also a hydraulic motor M2, designed, for instance in fleshing machines and in shaving machines, to drive the blade, sharpening device.

Following the position of the valve D2 (that is to say, following the flow of the fluid under pressure from the pipe '0 to the motor M2 by way of the pipe t or the pipe u), the hydraulic motor M2 turns in one direction or in the opposed direction and drives in the two directions the movement of a carriage carrying the grinder for sharpening the blades of the operating roller. The position of the valve D2 is determined, at the end of stroke, by the action of the carriage itself, in such a manner as to make the aforesaid to and fro movement automatic. For the sake of completeness references r1, r2, r3 designate the discharge pipings, V a safety valve and I an intercepting cock.

The invention as hereinbefore described offers the following advantages: great smoothness in the letting in of the driven members, absence of vibrations, self-lubrication of certain of the members, wide possibility of adjusting the umber of turns of the driven members, swiftness of drive control, constructive simplicity and reduced space requirement as compared with the mechanical system aiming at the same tasks.

Having now particularly described and ascertained the nature of my said invention andin what manner the same is to be performed, I declare that what I claim is:

1. A tanning machine having sundry rotating members, including at least one operating roller rotating at a high number of turns and at least one auxiliary roller rotating ata number of turns in general lower than said operating roller, a hydraulic system comprising a pump which puts a fluid under pressure and at least one hydraulic motor actuated by said fluid, said mOtOr being designed to rotate said auxiliary roller of the machine, and comprising also means by which the hydraulic motor driving the auxiliary roller is rotated only if said auxiliary roller moves close to the operating roller.

2.,A tanning machine having sundry rotating members, including at least one operating roller rotating at a high number of turns and at least one auxiliary roller rotating at a number of turns in general lower. than said operating roller, a hydraulic system comprising a pump which puts a fluid under pressure and at least one hydraulic motor actuated by said fluid, said motor being designed to rotate said auxiliary roller of the machine, and comprising also between the pump and the hydraulic motor or motors a cylinder with a plunger, which besides controlling the movement of said members, acts also as a distributor of the fluid permitting it to arrive at said hydraulic motor at the desired time.

3. A tanning machine having sundry rotating members including at least one operating roller rotating at a high number of turns and at least one auxiliary roller rotating at a number of turns in general lower than said operating roller,

a hydraulic system comprising a pump which puts a fluid under pressure and at least one hydraulic, motor actuated by said fluid, said motor being designed to rotate said auxiliary roller of the machine, and comprising also between the pump and the hydraulic motor or motors a cylinder with a plunger, which besides controlling the movement of said members, acts also as a distributor of the fluid permitting it to arrive at said hydraulic motor at the desired time, a lever, one end of which is attached to said one auxiliary roller, a rod, one end of which is connected to the other end of said lever, a gear connected to the other end of said rod, and said plunger having a rack meshing with said gear.

ERMANNO GIANOGLIO.

References Cited in the file of this patent 

